The kid's Hale by Muck Boots, will keep them comfy and dry, no matter what they get into. Even if you can't keep up with them, their Muck Boots will. Features: The stretch-fit topline binding is snug around the calf to keep warm air in and cold air out, fully insulated with 4mm neoprene which provides the optimal warmth, comfort, and waterproofing that you expect from a Muck Boot. The PK Mesh lining allows for breathability, Diamond tread self-cleaning outsole wraps the entire perimeter for maximum protection and stability that doesn't track mud! Comfort Range: 0 to 65F. Material: Neoprene, Mesh.